assume cs: code

code segment

         mov  ax, cs
         mov  ds, ax
         mov  ax, 20H
         mov  es, ax
         mov  bx, 0
         mov  cx, 17
    s:   mov  al, [bx]
         mov  es:[bx], al
         inc  bx
         loop s

         mov  ax, 4c00H
         int  21H

code ends
end
